86820881 has 8 divisors (see below), whose sum is σ = 99564864. Its totient is φ = 74162160.

The previous prime is 86820847. The next prime is 86820889. The reversal of 86820881 is 18802868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86820881 - 2⁶ = 86820817 is a prime.

It is a super-3 number, since 3×86820881³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (86820889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19115 + ... + 23216.

It is an arithmetic number, because the mean of its divisors is an integer number (12445608).

Almost surely, 2^86820881 is an apocalyptic number.

It is an amenable number.

86820881 is a deficient number, since it is larger than the sum of its proper divisors (12743983).

86820881 is a wasteful number, since it uses less digits than its factorization.

86820881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42631.

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 86820881 is about 9317.7723196052. The cubic root of 86820881 is about 442.8004594366.

The spelling of 86820881 in words is "eighty-six million, eight hundred twenty thousand, eight hundred eighty-one".